Johann Franz Heinrich Carl von Ostein

His father sold his inherited property, including the ancestral Schloss Ostein which was destroyed in the Thirty Years' War, to the Antoniter Commandery of Isenheim in Alsace.

In 1728, he bought the Datschitz estate (today "Dačice"), including the Castle there, from Count Franz Maximilian zu Fürstenberg in the southernmost tip of the Margraviate of Moravia for 430,000 guilders.

The purchase included the Maselov fortress and chateau, as well as the Roztěž [cs] hunting lodge, built in 1669 by Count Johann von Sporck.

This chateau, later rebuilt in the Empire style by one of his heirs, fell into disrepair after World War II and was purchased from the Czech Republic in 2002 by Taiwanese billionaire Terry Gou, CEO of Foxconn, for $30 million, which he fully renovated.

On 4 May 1690, Maria Anna married the childless King Charles II of Spain as his second wife in the monastery of San Diego near Valladolid at the instigation of his mother, Mariana of Austria.

She was a member of the family of the then ruling Elector and Archbishop of Mainz and Imperial Archchancellor of the Holy Roman Empire of the German Nation, Philipp Karl von Eltz-Kempenich.

They were the parents of Karl Theodor Anton Maria von Dalberg, the Prince-Primate of the Confederation of the Rhine as appointed by Napoleon in 1806.